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Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses
dc.contributor.author | Cuesta-García, Ana María | |
dc.contributor.author | Ichikawa, Rodrigo U. | |
dc.contributor.author | Londono-Zuluaga, Diana | |
dc.contributor.author | Gómez-de-la-Torre, María de los Ángeles | |
dc.contributor.author | Santacruz-Cruz, María Isabel | |
dc.contributor.author | Turrillas, Xavier | |
dc.contributor.author | García-Aranda, Miguel Ángel | |
dc.date.accessioned | 2017-05-12T10:24:13Z | |
dc.date.issued | 2017-06 | |
dc.identifier.citation | Cement and Concrete Research 96 (2017) 1–12 | es_ES |
dc.identifier.issn | 0008-8846 | |
dc.identifier.other | https://doi.org/10.1016/j.cemconres.2017.02.025 | |
dc.identifier.uri | http://hdl.handle.net/10630/13633 | |
dc.description.abstract | There are many commercially important multiphase materials which contain amorphous phases, such as cement pastes, porcelains, glass-ceramics or pharmaceutical compounds. However, the analysis of amorphous phase(s) within cement matrices that contain high amounts of crystalline phase(s) is a challenge. Here, we report measurements of total scattering data quantitatively analyzed by Pair Distribution Function (PDF) minimization and Rietveld methodology to determine phase compositions including both amorphous and nanocrystalline phase contents in cement-related samples. Furthermore, laboratory techniques were used to complement the sample characterization. In addition to five reference materials, the main phase of calcium aluminate cements, CaAl2O4 hydrated at 50 °C to yield crystalline hydrogarnet, Ca3Al2(OH)12, (43wt%) and nanocrystalline aluminum hydroxide gel, Al(OH)3·0.1H2O (50wt%) was also investigated. The PDF analyses revealed that the hydroxide gel has a gibbsite local structurewith an average particle size close to 5nm. PDF and Rietveld quantitative phase analysis results fully agree. | es_ES |
dc.description.sponsorship | This work has been supported by Spanish MINECO through BIA2014-57658-C2-1-R and BIA2014-57658-C2-2-R, which is cofunded by FEDER, research grants. R.U.I. acknowledges funding of CNPQ, grant no. 206983/2014-0/SWE. We also thank CELLS-ALBA (Barcelona, Spain) for providing synchrotron beamtime at BL04-MSPDand Dr. Oriol Vallcorba for his assistance during the synchrotron experiment. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.subject | Cristalografía por rayos X | es_ES |
dc.subject | Cemento | es_ES |
dc.subject.other | X-ray diffraction | es_ES |
dc.subject.other | Calcium aluminate cement | es_ES |
dc.subject.other | Hydrogarnet | es_ES |
dc.subject.other | Amorphous material | es_ES |
dc.subject.other | Aluminum hydroxide gel | es_ES |
dc.title | Aluminum Hydroxide Gel Characterization within a Calcium Aluminate Cement Paste by Combined Pair Distribution Function and Rietveld Analyses | es_ES |
dc.type | info:eu-repo/semantics/article | es_ES |
dc.centro | Facultad de Ciencias | es_ES |
dc.description.embargo | 2018-07-01 | |
dc.cclicense | by-nc-nd | es_ES |